<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      div {
        width: 160px;
        height: 350px;
        /* 边框盒子模型 */
        box-sizing: border-box;
        background-color: #f00;
        padding: 20px;
        margin: 20px;
        border: 5px solid #000;
        font-size: 100px;
      }
    </style>
  </head>
  <body>
    <div>内容</div>
    <div>内容</div>
  </body>
</html>
